What Is This Tool?
This tool converts data transfer units from IDE (UDMA mode 3), a legacy Parallel ATA interface mode, to SCSI (Async), an asynchronous data transfer mode of the SCSI protocol. It facilitates comparing transfer rates and understanding throughput in systems using these vintage interfaces.
How to Use This Tool?
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Enter the value in IDE (UDMA mode 3) units you want to convert.
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Select IDE (UDMA mode 3) as the source unit and SCSI (Async) as the target unit.
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Click the convert button to see the equivalent value in SCSI (Async) units.
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Use the results to analyze or document transfer rates for legacy hardware or troubleshooting.
Key Features
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Converts data transfer units specifically from IDE (UDMA mode 3) to SCSI (Async).
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Provides a straightforward conversion rate based on legacy storage interface protocols.
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Supports benchmarking and troubleshooting tasks for vintage and embedded computing systems.
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Enables comparison of legacy PATA/IDE and asynchronous SCSI transfer performances in datasheets or documentation.
Examples
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1 IDE (UDMA mode 3) equals 33.33 SCSI (Async).
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2 IDE (UDMA mode 3) equals 66.67 SCSI (Async).
Common Use Cases
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Comparing throughput rates between legacy PATA/IDE and asynchronous SCSI devices in benchmarks.
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Troubleshooting timing and handshake issues on SCSI buses in asynchronous mode.
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Configuring or testing retrocomputing or embedded systems using mixed interface storage devices.
Tips & Best Practices
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Verify that you select the correct units before conversion to ensure accurate comparisons.
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Use this conversion primarily for theoretical throughput assessments rather than precise real-world performance predictions.
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Refer to hardware documentation and benchmarks alongside converter results for thorough analysis.
Limitations
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Conversion shows theoretical throughput values and does not reflect actual device response times or bus delays.
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Real-world performance may vary due to hardware-specific implementations or arbitration on the SCSI bus.
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Not suitable for estimating synchronous SCSI performance or newer interfaces.
Frequently Asked Questions
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What does IDE (UDMA mode 3) represent?
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IDE (UDMA mode 3) is an Ultra DMA mode for Parallel ATA interfaces offering a theoretical maximum transfer rate of about 44.4 MB/s, commonly used in legacy PATA/IDE drives.
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What is SCSI (Async) mode?
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SCSI (Async) refers to the asynchronous data transfer mode in the SCSI protocol, relying on request/acknowledge handshakes rather than a shared clock for data exchange.
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Why convert from IDE (UDMA mode 3) to SCSI (Async)?
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Conversion helps compare and interpret data transfer rates between these legacy interfaces, useful in benchmarking, troubleshooting, and configuring vintage or embedded systems.
Key Terminology
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IDE (UDMA mode 3)
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A Parallel ATA Ultra DMA transfer mode with a theoretical max rate of about 44.4 MB/s, used in legacy PATA/IDE drives.
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SCSI (Async)
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An asynchronous SCSI data transfer mode that uses request/acknowledge handshakes instead of a shared clock.
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Conversion Rate
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The factor used to convert IDE (UDMA mode 3) units to SCSI (Async) units, here approximately 33.3333.